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Differences What are the advantages of each

Front view of Radeon HD 5770

Reasons to consider the
ATi Radeon HD 5770

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Much higher effective memory clock speed 4,800 MHz vs 1,600 MHz 3x higher effective memory clock speed
Higher clock speed 850 MHz vs 550 MHz Around 55% higher clock speed
Higher memory bandwidth 76.8 GB/s vs 25.6 GB/s Around 3x higher memory bandwidth
Better floating-point performance 1,360 GFLOPS vs 89.6 GFLOPS Around 15.2x better floating-point performance
More shading units 800 vs 32 768 more shading units
Higher texture rate 34 GTexel/s vs 8.8 GTexel/s More than 3.8x higher texture rate
Significantly higher memory clock speed 1,200 MHz vs 800 MHz 50% higher memory clock speed
Higher pixel rate 13.6 GPixel/s vs 4.4 GPixel/s More than 3x higher pixel rate
More texture mapping units 40 vs 16 24 more texture mapping units
More render output processors 16 vs 8 Twice as many render output processors
Front view of GeForce GT 120 Mac

Reasons to consider the
Nvidia GeForce GT 120 Mac

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Lower TDP 50W vs 108W 2.2x lower TDP

Features Key features of the Radeon HD 5770  vs GeForce GT 120 Mac 

memory bandwidth Rate at which data can be read from or stored in onboard memory

Radeon HD 5770
76.8 GB/s
GeForce GT 120 Mac
25.6 GB/s

pixel rate Number of pixels a graphics card can render to the screen every second

Radeon HD 5770
13.6 GPixel/s
GeForce GT 120 Mac
4.4 GPixel/s

texture rate Speed at which a graphics card can perform texture mapping

Radeon HD 5770
34 GTexel/s
GeForce GT 120 Mac
8.8 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 5770
1,360 GFLOPS
GeForce GT 120 Mac
89.6 GFLOPS

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes

Specifications Full list of technical specs

gpu

Radeon HD 5770  vs
GeForce GT 120 Mac 
GPU brand ATI Nvidia
GPU name Juniper G96 C1
Market Desktop Desktop
Clock speed 850 MHz 550 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 800 32
Texture mapping units 40 16
Render output processors 16 8
Pixel rate 13.6 GPixel/s 4.4 GPixel/s
Texture rate 34 GTexel/s 8.8 GTexel/s
Floating-point performance 1,360 GFLOPS 89.6 GFLOPS

memory

Radeon HD 5770  vs
GeForce GT 120 Mac 
Memory clock speed 1,200 MHz 800 MHz
Effective memory clock speed 4,800 MHz 1,600 MHz
Memory bus 128 bit 128 bit
Memory 1,024 MB 512 MB
Memory type GDDR5 GDDR3
Memory bandwidth 76.8 GB/s 25.6 GB/s

noise and power

TDP 108W 50W

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